a copy exactly like an original.
anything corresponding in all respects to something else.
Cards. a duplicate game.
to make an exact copy of.
to do or perform again; repeat: He duplicated his father's way of standing with his hands in his pockets.
to double; make twofold.
to become duplicate.
exactly like or corresponding to something else: duplicate copies of a letter.
consisting of or existing in two identical or corresponding parts; double.
Cards. noting a game in which each team plays a series of identical hands, the winner being the team making the best total score.
Idioms about duplicate
in duplicate, in two copies, especially two identical copies: Please type the letter in duplicate.
- du·pli·ca·tive, adjective
- non·du·pli·cat·ing, adjective
- pre·du·pli·cate, verb (used with object), pre·du·pli·cat·ed, pre·du·pli·cat·ing.
- qua·si-du·pli·cate, adjective
- self·-du·pli·cat·ing, adjective
- un·du·pli·cat·ed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use duplicate in a sentence
That duplicate pipe San Diego wants to build, which would sit parallel to the one Met uses now, wouldn’t produce any savings for ratepayers until at least 2063 – costing two generations of ratepayers at least $5 billion to build.The Water Authority Is Resurrecting Its Pipe Dream – Again | MacKenzie Elmer | September 1, 2020 | Voice of San Diego
Sometimes the duplicate copies persist for many millions of years before being lost, for reasons that Gramzow and Thießen are still investigating.By Losing Genes, Life Often Evolved More Complexity | Viviane Callier | September 1, 2020 | Quanta Magazine
Reporters had to run the data through multiple computer programs to remove any duplicate records and standardize information that was frequently misspelled.How We Found Out How Many Debt Collection Lawsuits Oportun Inc. Filed During the Pandemic | by Ren Larson and Kiah Collier | August 31, 2020 | ProPublica
In response, registrars need to search for duplicate entries that are usually mistakes – someone named Mike is registered in one county, moves and re-registers in another county as Michael, for example.GOP Chair Who Called Mail Voting ‘Fraught With Danger’ Voted by Mail 22 Straight Times | Andrew Keatts | August 10, 2020 | Voice of San Diego
Shepard said, for example, “We know that we only want one title per page, that the title should be relatively short – 50 to 60 characters – the title should be unique, meaning it shouldn’t be a duplicate of other titles on your site.”
He lost the bet on the twenty-eighth question, when a duplicate birthday turned up.
Wayne has infused the whole operation with a spirit of joy and dedication that is stealth seasoning no one can duplicate.
And it does seem true that Bitcoins are very hard to forge or duplicate.
Son of God is trying to duplicate the grassroots strategy that paid off for Gibson.Will ‘Son of God’ Be the Next Grassroots Christian Blockbuster? | Myra Adams | February 19, 2014 | THE DAILY BEAST
Illegible handwriting and typos lead to errors and duplicate entries.A Bipartisan Path to Fixing America’s Broken Elections | Michael Waldman | January 24, 2014 | THE DAILY BEAST
With this letter is another by the same writer, dated July 30, 1622—a postscript to a duplicate of the preceding letter.
Lessard uttered the command evenly, without a jarring note, his tone almost a duplicate of MacRae's.Raw Gold | Bertrand W. Sinclair
The original documents (in duplicate) are drawn up in Spanish and in English respectively.The Philippine Islands | John Foreman
I shall need more energy than your body has available in order to duplicate myself.Insidekick | Jesse Franklin Bone
The results with the gases duplicate in every particular the observations made on the solutions (see below, p. 24).The Elements of Qualitative Chemical Analysis, vol. 1, parts 1 and 2. | Julius Stieglitz
British Dictionary definitions for duplicate
copied exactly from an original
existing as a pair or in pairs; twofold
an exact copy; double
something additional or supplementary of the same kind
two exact copies (esp in the phrase in duplicate)
(tr) to make a replica of
(tr) to do or make again
(tr) to make in a pair; make double
(intr) biology to reproduce by dividing into two identical parts: the chromosomes duplicated in mitosis
- duplicable (ˈdjuːplɪkəbəl), adjective
- duplicability, noun
- duplicately, adverb
- duplicative, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012